v3.26.1
MERGER WITH MESA AIR GROUP, INC. - Narrative (Details)
$ / shares in Units, $ in Millions
6 Months Ended
Nov. 25, 2025
USD ($)
director
aircraft
$ / shares
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Dec. 31, 2025
$ / shares
Business Combination [Line Items]      
Common stock, par value (in dollars per share) | $ / shares   $ 0.001 $ 0.001
Equity participation right $ (2.3)    
Republic Airways Holdings Inc.      
Business Combination [Line Items]      
Number of director designated | director 7    
Purchase agreement term 10 years    
Share conversion rate 38.9933    
Equity interest acquired, percent 88.00%    
Merger related costs $ 19.6    
Proceeds from asset sales 8.4    
Escrow shares (in shares) | shares   109,106  
Consideration transferred $ 120.2    
Goodwill adjustment   $ (12.5)  
Republic Airways Holdings Inc. | E175      
Business Combination [Line Items]      
Number of aircraft operated | aircraft 60    
Republic Airways Holdings Inc. | United Airlines      
Business Combination [Line Items]      
Purchase agreement term 10 years    
Merger funding $ 23.6    
Escrow shares (in shares) | shares   2,744,348  
Start-up costs received by third party $ 49.0    
Republic Airways Holdings Inc. | Legacy Republic      
Business Combination [Line Items]      
Number of director designated | director 6    
Common stock, par value (in dollars per share) | $ / shares $ 0.001    
Equity interest acquired, percent 88.10%    
Percentage of voting interest relinquished 11.90%    
Republic Airways Holdings Inc. | Mesa Air Group, Inc.      
Business Combination [Line Items]      
Number of director designated | director 1    
Common stock, par value (in dollars per share) | $ / shares $ 0.001    
Equity interest acquired, percent 6.00%    
Escrow shares held, percent 6.00%    
Shares issued (in shares) | shares 2,853,454    
Republic Airways Holdings Inc. | Mesa Air Group, Inc. | United Airlines      
Business Combination [Line Items]      
Adjusted net debt settlement   $ 51.7  
Republic Airways Holdings Inc. | United Airlines      
Business Combination [Line Items]      
Equity interest acquired, percent 5.90%